New user has problem

New here, so I really don't know if this is the right forum to post this.

Here's my problem - I have SOMETHING going on with my comp. My homepage has been hijacked, and, I used the CW Shredder in the past to fix this, but it's not working this time. I've used spybot and adware, and they haven't helped either.

Besides the pop ups and the homepage problem, there are other oddities. For starters, my computer seems to "stick" (or take a long break) when I try to access my control panel from the start menu. Secondly, and this is really strange, it seems to take FOREVER to shut down. I'm talking about a couple of minutes.

Your process lists shows many useless and very suspicious programs. So does the startup programs list.
C:\WINDOWS\SYSTEM\HPZTSB04.EXE and C:\WINDOWS\SYSTEM\A.EXE should set anyones alarm bells ringing.

All i can suggest is another spyware scan with latest updates (you did update your software before scanning), a thorough virus scan with latest updates and at least two scanners. And a very critical look at startup programs.